Wine Blending: How to Create Your Own Custom Blends

What Is Wine Blending?

Wine blending is the practice of combining two or more separately made wines to create a final product that is greater than the sum of its parts. It is one of the oldest and most important techniques in winemaking, practiced at every level from the smallest home cellar to the grandest chateaux.

Blending is not about mixing whatever you have on hand and hoping for the best. It is a deliberate, thoughtful process of identifying what each component wine contributes and combining them in proportions that achieve a specific goal: better balance, greater complexity, improved structure, or a more appealing flavor profile.

Some of the world's most celebrated wines are blends. Bordeaux wines are blends of Cabernet Sauvignon, Merlot, Cabernet Franc, and sometimes Petit Verdot and Malbec. Champagne blends Chardonnay, Pinot Noir, and Pinot Meunier. The Rhone Valley's GSM blend combines Grenache, Syrah, and Mourvedre. In each case, blending produces a wine that no single variety could achieve alone.

For home winemakers, blending is an extraordinarily powerful tool because it allows you to compensate for the limitations of individual batches. A wine that is too acidic can be blended with one that is too soft. A wine with great aroma but thin body can be married to one with rich texture but muted nose. Blending transforms imperfect components into a polished whole.

Why Blend?

The motivations for blending fall into several categories:

• Balance correction: Blending a high-acid wine with a low-acid wine achieves a balanced acidity without chemical adjustment
• Complexity enhancement: Combining wines with different aromatic profiles creates a more complex, interesting nose and palate
• Color improvement: A pale red can be deepened by blending with a small amount of a deeply colored variety like Petite Sirah or Alicante Bouschet
• Structural modification: A wine lacking tannin structure can gain backbone from a blend component with firm tannins
• Consistency: Blending across vintages or batches ensures a consistent house style
• Volume: Blending allows you to make enough wine for a full bottling run when individual batches are too small

Principles of Wine Blending

Complementary vs. Similar Blending

There are two fundamental approaches to blending:

Complementary blending combines wines that are different from each other, each contributing something the other lacks. This is the more common and generally more interesting approach:

• Aromatic wine + neutral wine = complex aroma with balanced body
• High-acid wine + soft wine = balanced acidity
• Fruity wine + structured wine = complete wine with both appeal and backbone

Similar blending combines wines that are alike but from different sources, aiming for a more refined version of a single style. This approach is common in commercial winemaking for consistency:

• Two batches of Merlot from different vineyard blocks
• Same variety from different barrels with different toast levels
• Different vintages of the same wine

The Principle of Synergy

A successful blend exhibits synergy: the blended wine has qualities that none of the individual components possess. When Merlot's soft, plummy fruit meets Cabernet Sauvignon's structured tannin and cassis, the result is not simply the average of the two. The Merlot fills in the Cabernet's mid-palate, the Cabernet extends the finish, and new flavor interactions emerge at the point of convergence. This synergy is what makes blending so rewarding.

The Rule of Dominance

In most blends, one wine serves as the base (typically 50-80% of the blend) and the other wines serve as seasoning components (smaller percentages that modify the base). The base wine defines the overall character of the blend. The seasoning wines adjust, enhance, or correct specific aspects.

This is an important principle for home winemakers to understand. You do not need to blend in equal proportions. In fact, some of the most effective blends use very small additions. Even 5-10% of a strongly flavored or deeply colored wine can meaningfully transform the base wine.

Famous Blends to Inspire Your Winemaking

Bordeaux Blend

The archetype of red wine blending:

• Cabernet Sauvignon (40-70%): Structure, tannin, blackcurrant, aging potential
• Merlot (20-40%): Softness, plum fruit, mid-palate roundness
• Cabernet Franc (5-15%): Aromatic lift, herbal complexity, violets
• Petit Verdot (0-5%): Color, spice, tannic backbone
• Malbec (0-5%): Color depth, dark fruit

Rhone GSM

The signature blend of the Southern Rhone:

• Grenache (40-70%): Red fruit, warmth, alcohol, body
• Syrah (15-30%): Color, spice, dark fruit, structure
• Mourvedre (10-20%): Earthy depth, tannin, gamey complexity

White Bordeaux

A classic white blend:

• Sauvignon Blanc (50-70%): Acidity, citrus, herbal aromatics
• Semillon (30-50%): Body, waxy texture, richness, honey notes

Super Tuscan

Italian innovation with French varieties:

• Sangiovese (50-70%): Cherry, acidity, Italian character
• Cabernet Sauvignon (20-30%): Structure, cassis, tannin
• Merlot (10-20%): Softness, plum, accessibility

How to Conduct a Blending Trial

Step 1: Assess Your Component Wines

Before blending, taste each component wine individually and document its characteristics:

• Color: Depth, hue, clarity
• Aroma: Primary fruit aromas, secondary notes, any off-aromas
• Palate: Acidity, tannin, body, sweetness, alcohol heat
• Finish: Length, quality, any bitterness or harshness
• Strengths: What does this wine do well?
• Weaknesses: What is it lacking?

Record these observations for every component. This assessment guides your blending decisions by identifying what each wine can contribute and what it needs from others.

Step 2: Set Your Goal

Define what you want the final blend to achieve. Be specific:

• "A medium-bodied red with balanced tannin, bright cherry fruit, and moderate oak influence"
• "A crisp white with citrus aromatics, good acidity, and enough body for food pairing"
• "A deeply colored, full-bodied red with firm tannin structure for aging"

Your goal determines which components to include and in what proportions.

Step 3: Calculate Bench Trial Ratios

Prepare small-volume test blends (bench trials) before committing to a full-batch blend. This is the most important step in the blending process.

Equipment needed:

• Graduated cylinder or measuring pipette (marked in milliliters)
• Several clean wine glasses (identical glasses for fair comparison)
• Notebook and pen for recording ratios and impressions
• A neutral palate: Have water and plain crackers available for palate cleansing between samples

Procedure:

1. Start with 100 ml total volume for each trial blend
2. Create 4-6 different blends at varying ratios. For a two-wine blend, try:
   • 90/10, 80/20, 70/30, 60/40, 50/50
3. For a three-wine blend, try:
   • 70/20/10, 60/25/15, 50/30/20, 50/25/25
4. Measure precisely using a graduated cylinder
5. Mix each blend thoroughly and label clearly

Step 4: Evaluate the Blends

Taste each trial blend against the individual components and against each other:

1. Look: Assess color depth and clarity
2. Smell: Evaluate aromatic complexity and balance
3. Taste: Assess acidity, tannin, body, and fruit
4. Finish: Note length and quality
5. Overall: Which blend best achieves your stated goal?

Rank the blends from most to least preferred. Identify the top 2-3 candidates and retaste them side by side.

Important: Do not trust your first impression alone. Taste the candidate blends over two or three sessions on different days. Palate fatigue and daily variation can influence your judgment. A blend that tastes best on a single tasting may not be the best choice upon repeated evaluation.

Step 5: Refine the Winning Blend

Once you identify the best ratio range, prepare a second round of bench trials with finer gradations around that ratio. If 70/30 was the best in the first round, try:

• 75/25, 72/28, 70/30, 68/32, 65/35

This refinement step often reveals significant differences in small ratio changes. The difference between a 70/30 and a 75/25 blend can be surprisingly large.

Step 6: Scale Up

Once the final ratio is determined, calculate the volumes needed for your full batch:

• If your winning ratio is 72/28 for a 5-gallon (19 liter) blend:
  • Wine A: 19 x 0.72 = 13.7 liters
  • Wine B: 19 x 0.28 = 5.3 liters

Measure carefully and combine in a clean, sanitized vessel. Stir gently to mix thoroughly.

Step 7: Rest and Re-Evaluate

After blending the full batch, allow the wine to rest for 2-4 weeks before bottling. The blend components need time to marry, a term winemakers use to describe the integration of different wines into a unified whole. A freshly blended wine can taste disjointed or rough. After a few weeks of rest, the flavors knit together and the wine presents as a cohesive product.

Taste the blended wine after the rest period. If it has not achieved the desired result, small adjustments are still possible (additional small additions of a component, acid adjustment, fining).

Blending Tips for Home Winemakers

Start Small

If you are new to blending, start with two-component blends. Two-wine blends are easier to manage and understand. Once you are comfortable evaluating and adjusting two-wine combinations, move to three-component blends.

Blend Dry Wines

Always blend wines that are fermented to dryness unless you specifically intend to produce an off-dry or sweet blend. Blending wines with residual sugar introduces complications with refermentation risk and stability.

Record Everything

Detailed notes are essential. Record the exact ratio of every bench trial, your tasting impressions, and the final blend proportions. These records become invaluable when you want to replicate a successful blend in future vintages or troubleshoot a blend that did not meet expectations.

Do Not Blend Flawed Wines

Blending cannot fix a fundamentally flawed wine. A wine with volatile acidity (vinegar taint), Brettanomyces (barnyard, band-aid), or cork taint (musty, wet cardboard) will contaminate any blend it touches. Evaluate each component critically before including it.

Consider Timing

Blending can be done at various stages:

• Pre-fermentation: Blending musts before fermentation (co-fermentation). Produces the most integrated results but eliminates your ability to adjust individual components
• Post-fermentation, pre-aging: Blending young wines and aging the blend together. Good integration with retained flexibility
• Pre-bottling: Blending after aging. Maximum flexibility but requires longer integration time after blending

Frequently Asked Questions

Can I blend red and white wines together?

Yes. Blending a small amount of white wine into red is a legitimate technique used in regions like the Northern Rhone, where Viognier (up to 20%) is co-fermented with Syrah to add aromatic lift and stabilize color. At home, adding 5-15% white wine to a red blend can lighten the color, add aromatics, and brighten the acidity. The reverse (adding red to white) produces a rose-like wine.

How many wines can I blend together?

There is no hard limit, but complexity increases rapidly with more components. Most successful blends use 2-5 components. Beyond five, individual contributions become difficult to discern, and the risk of producing a muddled, indistinct wine increases. Start with fewer components and add complexity gradually.

Will blending change the alcohol level?

Yes. The blended wine's alcohol level is the weighted average of the components. Blending a 12% wine (70%) with a 14% wine (30%) produces a blend at approximately 12.6%. This is usually not a concern unless the difference between components is extreme.

How long should a blend rest before bottling?

Allow a minimum of 2-4 weeks for the blend components to marry. For blends involving wines with very different characters (such as an oaked wine with an unoaked wine), 4-8 weeks of rest produces better integration. Taste the blend periodically and bottle when it tastes unified and harmonious.

Can I blend wines from different fruits?

Absolutely. Fruit wine blending opens creative possibilities that grape wine rarely offers. Blending apple wine with blackberry wine creates complexity that neither achieves alone. The principles are the same as grape wine blending: assess each component, set a goal, conduct bench trials, and scale up the winning ratio. Use acid and sweetness balance as your primary guide when blending different fruit wines.